Reportedly make fun of supporters on course (4)
I believe the answer is:
tees
'supporters on course' is the definition.
'tees' can be an answer for 'supporters' (tees support golf balls). I'm unsure of the 'on course' bit.
'reportedly make fun of' is the wordplay.
'reportedly' indicates a 'sounds like' (homophone) clue.
'make fun of' becomes 'tease' (to make fun of someone is to tease them).
'tease' sounds like 'TEES'.
Can you help me to learn more?
(Other definitions for tees that I've seen before include "Sides of Trent" , "River on which Middlesbrough stands" , "Golf pegs" , "Golf ball props" , "Golfer's equipment" .)